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8 September, 19:02

Diego is playing basketball. while running at 7 km/h toward a basketball hoop, he throws the ball at the net. the ball travels at 20 km/h. what is the speed of the ball relative to the net?

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  1. 8 September, 19:05
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    The wording is somewhat ambiguos. To avoid ambigüity, it should be stated to which frame of reference is reported the speed. of the basketball.

    The options are:

    1) If the speed of the ball (20 km/h) is refered to Diego, given tha the hoop is at rest, the spped of the ball relative to the net will be the speed of Diego + the speed of the ball: 7 km/h + 20 km/h = 27 km/h.

    2) If the speed of the ball (20 km/h) is relative to the ground then, given that the hoop is fixed, the speed of the ball relative to the net is 20km/h.
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